poindexter



(No Model.\

H. E. PO-INDEXTER.

SAW JOINTER.

Patented'Dec. 16,1890.

WVE V'TOR.

WIT VESSES.

UNITED STATES ATENT rrrcn.

ROBERT E. IOINDEXTER, OF INDIANAPOLIS, INDIANA.

SAW-JOINTER.

SPECIFICATION forming part of Letters Patent No. 442,688, dated December 16, 1890.

Application filed December 17, 1889. Serial ITox 334,011. (No model.)

To aZZ whom it Duty concern.-

Be it known that I, ROBERT E. POINDEXTER,

a citizen of the United States, residing at Indianapolis,in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Saw Jointers, of which the following is a specification.

My said invention relates to various improvemen ts in that class of saw-jointers, which consists in a cast-metal block provided with suitable seats for receiving and a clamp for holding the file in position; and it consists, first, in a peculiar arrangement of-the rests and the clamp, whereby the file may be clamped in both positions in the upper half of the block; second, in the arrangement of the bearing parts on the lower half of the block, whereby a positive rest at a certain angle is provided, thus constituting a gage in jointing the sides of the teeth, and in various other improvements in the details of construction, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure l isa front elevation of one of my improved saw-jointers with the file therein, indicated by dotted lines in both positions; Fig. 2, a central vertical section through the same on the dotted line 2 2, the

file being indicated by dotted lines in the horizontal position; Fig. 3, a similar view on the dotted line 3 3, the file being shown in whole lines in the vertical position as when used for jointing the sides of the teeth, anda portion of a saw being also shown, against which the tool is resting as when in operation; and Fig. 4, a detail cross-section on the dotted line t a in Fig. 1.

In said drawings the portions marked A represent the saw B, the file, and O the j ointerblock. The saw Aand file B are or may be of the usual and well-known form, and need no description herein. The jointer-block O is in general of a well-known form, such as isillustrated in my former patents, consisting of an open cast-metal block having a gage-plate C of the usual coustructiomasliding clamp C for holding the file in different posit-ions, and suitable rests and bearings for the file and the tool when in operation, as will be now described.

The sliding clamp C consists of a slotted plate mounted in a vertical way provided therefor in the center of the block and'adapted to be operated by a set-screw 0 provided with a shoulder which rests against the lower face thereof, and is mounted to operate in a screw-threaded perforation in the lug c, which is cast on the block (J and extends out through the slot of said plate. The upper portion of said plate is held firmly in place by means of a block 0, formed to fit closely in the slot, which is provided with overhanging lips or edges which rest upon the outside face of the plate on both sides of said slot, said block 0 being held in position by a bolt or screw 0, which is preferably the same screw .which holds the gage-plate O in position. The upper edge e of this sliding plate forms the lower jaw of the clamp which secures the file in position when put in the tool horizontally, and points 0", extending out from the face thereof near its edge and at a suitable position thereon, (about midway of its length,)

serve as the lower jaw of the clamp which holds the file in position when placed in the tool vertically. Points 0 are provided at the top edge of the block near each end, which extend out therefrom a suitable distance and serve as the upper jaw of the clamp for the file in either position. Short vertical ribs 0 are formed near each end of the block upon which the file rests and is supported when in the tool vertically, which ribs are formed slightly inclined or narrowing from their lower to their upper ends, and are thus adapted to give the tile when resting upon them an inclined position in the tool. A bearing-ledge 0 extends longitudinally from the central portion of the block, and a similar ledge c parallel therewith extends from the lower edge of the block. Said central ledge c is preferably somewhat wider than that c, and thus a straight line drawn through their points will be somewhat out of a perpendicular, or a perpendicular line drawn outside their points will pass nearer the ledge 0 than to the ledge c, as shown in Fig. 3. The purpose of jointing the sides of saw-teeth, as is well known, is to smooth them off evenly, and this has heretofore been a difficult; and particular operation after the teeth were set, usually rethe side of the saw at an opposite angle, this difficultyis overcome, and the file is presented 1 to the teeth in a position substantially parallel with the angle thereof afterhavi-ng been -s'et, and t-he operation-of dressing-the sides of :the teeth; evenly from their-pointsto their; 2ev baseswithoutremoving the sharppoints de- -signed-for cutting is. rendered-very simple.

' -By reasonofuhaving the; two: bearingrledges c andc both belowvthe file and at adistance *fromeach other, the operatoraiswenabled to restuthe tool firmly-against the sideaof the and care have beenrequired in performing the work. a

terial on the face of the ribs cTthe file canbe i' W adjusted to just exactly theposition and angle-desired and then clamped in position,

5 and the uniform dressing of the ,teeth of the a saw is'assured, it being possible by this arfrangement of the ledges and these supporting-ribs to gage the angle to just. exactly that :i; degre'edesired. As the file isclainpedin both -4o=positions in the upper half of the block, this positiverest for thertool' against the side of I the saw is secured when jointing the points iisaw, and the operation is thus made very:v :simple and easy, While heretofore much skill AsWill be readily "understood, :by placing thin strips of wood, paper, or any other llldr of the teeth, as well as when'dressing their sides. By reason of securing-the upper end of the sliding clamp (J firmly against the block by means of the block 0 no variation of the position of the file when once fixed can occur, as all parts are tight in their positions and prevented from any rattling or moving until released.

7 Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, in a saw-jointer, of a block provided with a file-bee. ring in its upper part, a file, and a clamp provided with jaws arranged to clamp the tile against said file-bearing when placed against it either flatwiser or edgewise,substantiallyasj-gset forth. 2.11m a saw-joi'nter, the combination of the jointer-blo'ck formed :with, points or projectionsrneanits upper-edge against which either oneedgeor one side of-the file mayrest when placed therein, said-file. and a .clamping device mounted on saidblock and provided with a'bearing .or jaWtdengage with the other edge or side of said file when placedin said block; either fiatwise ,or .edgewisek-substantially asset forth. i. 3. ,The combination, ina saw-jointer, of the block, the file a clamp-'for securing said file -in positiomeonsisting ofya sliding vslotted plateioperated bya-set-screw, and a-vclip for hol'dingthe top end of said plate firmly and steadily-against the block, substantially as ;set forth.

In witness whereof Ihave hereunto. set my handand seal, at Indianapolislndiana, this 14th day ofDecember, A. D. 1889.

rorrnrr, ronmrxrrr. [1 s] i Witnesses:

E.- W.-BRADFORD,

.JAMEs. WALsH. 

